107市政隧道穿越七里河施工技术研究及实践

Research and Practice on Construction Technology of 107 Municipal Tunnel Across Qili River

本文以郑州市107隧道实际工程为例,针对隧道下穿七里河、施工难度大、安全风险高的特点,在不影响下穿河流的泄洪功能的同时,采用明挖法和组合防渗体系,对河流进行改道、分期施工,对河堤进行外扩、围堰施工、清淤与回填,最终完成该区段的市政隧道施工,旨在为类似工程提供借鉴。

This paper takes the actual project of 107 tunnel in Zhengzhou as an example. It is characterized by difficult construction and high safety risk for the tunnel to pass through the Qili River. While not affecting the flood discharge function of the river, the open cut method, combined anti-seepage system, diversion of the river, phased construction, external expansion of the river, cofferdam construction, dredging and backfilling are adopted to complete the construction of the municipal tunnel in this section, which will provide a reference for similar projects.